CVE-2022-26189
Published: 22 March 2022
Summary
CVE-2022-26189 is a critical-severity Command Injection (CWE-77) vulnerability in Totolink N600R Firmware. Its CVSS base score is 9.8 (Critical).
Operationally, ranked in the top 16.2% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
Deeper analysis
TOTOLINK N600R routers running firmware version V4.3.0cu.7570_B20200620 contain a command injection vulnerability in the login interface. The flaw is triggered through the langType parameter and is tracked as CWE-77, carrying a CVSS 3.1 score of 9.8 that reflects network attack vector, low complexity, and no required authentication or user interaction.
An unauthenticated remote attacker can supply a crafted langType value to the login endpoint and execute arbitrary operating-system commands on the device. Successful exploitation grants full control over the router, allowing confidentiality, integrity, and availability impacts.
The EPSS score for this CVE rose from a low baseline to a peak of 0.1944 on 2025-12-11 before receding to the current value of 0.0195, indicating a period of increased exploitation interest after public disclosure. The referenced technical write-up demonstrates the injection but does not detail vendor patches or mitigation steps.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2022-30753
Vulnerability details
TOTOLINK N600R V4.3.0cu.7570_B20200620 was discovered to contain a command injection vulnerability via the langType parameter in the login interface.
- CWE(s)
Related Threats
No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.
Affected Assets
Mitigating Controls
No mitigating controls mapped yet. The per-CVE control annotator has not reached this CVE.